A review on remediation technologies for heavy metals contaminated soil

Document Type : Review paper

Authors

1 The Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China

2 UNESCO Chinese Center of Marine Biotechnology, Ocean University of China, Qingdao 266003, China

Abstract

The Today, synthetic products such as industrial waste, pesticides, batteries, paints, and industrial or domestic sludge widely applied, as well as and manufacturing can adversely result in heavy metal contamination of urban and agricultural soils. Simultaneously, by growth of industrialization and urbanization, the environmental safety of soil has become of great concerns. Based on investigating the status of soil contamination, the remediation technologies of soil contaminated by heavy metals were focused in the present study. To this aim, physical remediation, chemical remediation and biological remediation were all paid attention. To supply required references to the present study, the mechanisms of remediation, strengths and drawbacks developing trend were discussed. It is proposed that for effective and economic remediation of soil, a better understanding of remediation procedures and the various options available at the different stages of remediation is highly necessary.
 

Graphical Abstract

A review on remediation technologies for heavy metals contaminated soil

Highlights

  • Due to industrialization and urbaniz- ation, environmental safety of soil has become a challenge. 
  • Biotechnological tools gradually became important technique for the last few decades for removal of metal ions pollution.
  • Potassium phosphate is considered more effective in extracting arsenic among various potassium and sodium salts.
  • The remediation mechanisms such as extracellular complexation, precipi-tation, oxidation-reduction reaction and intracellular accumulation).

Keywords

Main Subjects


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